Question: Bucharest is the capital of which country?
Paraphrase: Bucharest is the capital of which nation?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q19660 wdt:P1376 ?obj . ?obj wdt:P31 wd:Q3024240 } 
Answer: Kingdom of Romania, Principality of Wallachia, United Principalities, National Legionary State